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Part
No. 4011
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Part
No. 4012
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SPECIFICATIONS
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Size
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Bore
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Stroke
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HP
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Max
RPM
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Weight
(oz)
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Propeller
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4011
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.40
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0.84
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0.72
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1.0
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13,000
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13.5
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10
x 6
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4012
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.40
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0.84
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0.72
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1.0
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13,000
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16.5
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P-225
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WARNING
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PLEASE
READ ALL SAFETY
INSTRUCTIONS! Failure to read, understand and follow
these instructions could result in personal injury and/or
property damage to yourself or others.
Take
a few moments to familiarize yourself with the various parts
of the engine. DO NOT DISASSEMBLE YOUR ENGINE! Doing so will
void your warranty. No exceptions!
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ENGINE
BREAK-IN
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It
is unnecessary to give the engine a prolonged break-in. However,
we suggest that you mount your engine to a break-in stand
to familiarize yourself with it and with the carburetor operation.
It is strongly recommended that fuels containing more than
15% nitromethane be avoided until after the engine has been
in operation for about an hour on a mild fuel, and under mixture-rich
conditions. Mixture-rich operation is when the engine has
a slight burbling sound and probably a very smoky
exhaust. This helps lubrication and cooling when the engine
is new.
Typically,
an engine will be ready for full-throttle and mixture-lean
operation after less than an hour of running. When the engine
holds R.P.M. after the mixture has been leaned out ... when
R.P.M.s dont sag after a moment or so ... the
engine can be considered to be broken in.
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ENGINE
AND FUEL TANK INSTALLATION
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The
engine may be installed upright, on either side, or inverted
(upside down). The 1/4 inch diameter output shaft mounts standard
hole-size propellers.
Mount
the engine firmly to hardwood rails, or to the firewall, if
you use a radial mount. For maximum security, use carbon steel,
self-locking hex nuts and hardened alloy steel machine screws
to mount the engine. The fuel tank size, location, and height
have a great influence on engine operation. For carburetor
engines, locate the tank so that its horizontal centerline
is from 1/4 to 3/8 below the fuel connection to
the carburetor.
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STARTING
THE ENGINE
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With a
full tank of fuel, the recommended propeller installed, and
a fully-charged booster battery of no more than 1.5 volts
ready for connection to glow plug, proceed as follows to manually
start an engine installed in a plane.
NOTE:
To avoid burning out the glow plug, never use a booster battery
of more than 1.5 volts. The battery is used to heat the glow
plug coil only during engine starting. After the engine has
started and is running smoothly, the booster battery is disconnected.
Heat from the burning mixture in the cylinder keeps the coil
hot.
1.
With the booster battery disconnected, turn the needle valve
counter-clockwise 2-1/2 turns from the fully closed position.
2.
With the booster battery still disconnected and with the throttle
wide open, place finger tip over the carburetor inlet and
flip the propeller quickly 2 or 3 times, to prime the engine.
3.
Remove finger tip from the carburetor inlet then close the
throttle to a fast idle setting and again flip the propeller
quickly 2 or 3 times.
4.
Connect the booster battery clip to the glow plug.
NOTE:
Make sure you are holding your airplane firmly to prevent
it from lurching forward when the engine starts. After it
starts, maintain your hold until you have reduced the throttle
to a low idle speed.
5.
Slowly turn the propeller (counter-clockwise) and feel
for a momentary resistance, which indicates ignition of the
mixture in the cylinder.
6. Quickly
flip the propeller to start the engine and then disconnect
the booster battery.
7. Except
for the first hour or so, as noted under Engine
Break-in, adjust the needle valve by turning clockwise
to lean the mixture for full power operation. If the R.P.M.
starts to sag (back-off) you have leaned the mixture too much
and you should then turn the needle valve counter-clockwise
until the R.P.M. picks up and holds steady.
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CARBURETOR
ADJUSTMENTS
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The carburetor
enables easy adjustment of both the idle speed and idle mixture.
Install needle valve by screwing it in all the way to its
seat, then unscrew 2-1/2 turns. This will be a rich setting
after engine starts. Screw in to desired setting (not too
lean) Low Speed Disk is preset at factory.
NOTE:
Always adjust idle speed first and idle mixture last. Typically,
it will be necessary to go back and forth several times to
get both the engine idle speed and idle mixture adjusted properly.
Turn
the idle speed screw clockwise to increase speed; counter-clockwise
to decrease speed. Turn the idle-mixture screw counter-clockwise
to enrich the mixture; clockwise to lean the mixture. Typically,
an idle speed of 2300 R.P.M. is a dependable idle setting.
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NEEDLE
VALVE SET-UP
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Locate
an area to install the remote needle valve assembly. This
assembly must be in the fuel line between the tank and the
carburetor. The line should not exceed five (5) inches in
total length.
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PROPELLERS
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A
10x6p propeller is recommended as a starting size. However,
experimenting with one pitch or diameter larger or smaller
can improve results for your particular airplane.
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GLOW
PLUGS
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This
engine comes equipped with a standard Long Reach Glow Plug
(K&B No. 7311). Performance will vary, depending on the
glow plug and fuel used.
Idlebar
Long Reach, K&B No. 4520
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Max
R.P.M.
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Idle
R.P.M.
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13,000
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2,600
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Above
comparisons are with a 10x6p wood propeller and K&B
500 fuel.
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ENGINE
CARE
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Dust and
dirt are the worst enemies of your engine. At all times, keep
the engine and the fuel clean. Wipe engine surfaces clean with
a rag dipped in a solvent such as methanol or paint thinner,
or use a soft-bristle, metal brush to clean engine surfaces.
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TIPS
ON AIR FILTERS
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Long-life
engine operation where dusty conditions prevail requires the
use of an air filter at the carburetor. The filter must be
able to clean the air of dust particles without creating an
unnecessary restriction to air flow into the engine. An air
filter must be cleaned or replaced frequently, depending on
its design.
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BASIC
TROUBLESHOOTING
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Improper
fuel/air mixtures, bad ignition, worn-out carburetors, or
weak cylinder compression are the main causes of hard starting,
poor power, slow throttle response, or unreliable engine idle.
Fuel/air
mixtures cause trouble if there is too much or not enough
fuel admitted to the cylinder which can result from improper
fuel tank height, design or needle valve adjustment; leaking,
kinked or plugged fuel lines; leaking connections, or a bad
fuel tank vent.
Ignition
can be the cause of starting trouble if (a) the booster battery
is weak or dead, (b) there are bad connections to the battery
or the plug, or, (c) the glow plug coil is burned out. Ignition
can be the cause of trouble after the booster battery is disconnected
if (a) the glow plug has an air leak at the center post or
around the gasket, (b) if the glow plug coil is burned out.
Compression
is evident if the engine has good resistance when it is cold
and being turned through by hand. Little or no resistance
means that the piston or cylinder wall is worn excessively,
or that the cylinder head is loose or looking.
An engine
that varies in speed even though the throttle valve or the
needle valve is not being moved, probably has an air leak
in the crankcase. Other locations of an air leak can be the
connections in the fuel line filter, or a pin hole in the
fuel line.
CAUTION:
Do not remove piston ring from piston unless it is to be replaced
with a new part. Once removed, the ring shape will become
distorted and should not be reinstalled.
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RECOMMENDED
FUEL
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K&B
500 or K&B 100+
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©
Model Engine Corporation of America, All rights reserved.
K&B and the oval logo are Registered Trademarks of Model Engine
Corp. of America
Registered U.S. Patent Office
No
part may be reproduced without written permission from
MECOA/K&B -- P.O. Box 5 -- Sierra Madre, CA 91025 U.S.A.
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